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| AK5397高性能32位立体声ADC解决方案 |
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| 文章来源： 更新时间：2014/12/17 16:43:00 |
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AKM公司的AK5397是高性能32位立体声ADC,立体声输出的动态范围127dB,取样频率8kHz ~ 768kHz,S/(N+D)为108dB,通带 0 ~ 21.82kHz (@ fs=48kHz) ,阻带衰减100dB,通带波动+0.00010/-0.00015dB.本文介绍了AK5397主要特性,框图, 应用电路图以及评估板AKD5397-SA主要特性和电路图.
The AK5397 is a high performance 32-bit stereo ADC that achieves class leading performance of 127dB dynamic range for stereo output. This is a flagship addition to AKM’s VERITA series of product in the Audio 4 ProTM family. The AK5397 integrates a newly developed circuit by VELVET SOUNDTM technology achieving rich sound field and bass representation that realizes a music playback experience with less distortion. The class leading performance with a maximum 768kHz PCM output is supported for digital output and newly developed 32-bit digital filters are integrated for the best sound quality. The AK5397 is suitable for digital video recorders and high quality sound studio mixers for recording and editing high-resolution sound sources.
AK5397主要特性:
Advanced multi bit Architecture ADC
Resolution: 32bit
Sampling Rate: 8kHz ~ 768kHz
Full Differential Inputs
S/(N+D): 108dB
DR, S/N: 127dB (Mono Mode: 130dB)
Sharp Roll Off Digital Filter (GD=41.5/fs)
Passband: 0 ~ 21.82kHz (@ fs=48kHz)
Passband Ripple: +0.00010/-0.00015dB
Stopband Attenuation: 100dB
Short Delay Digital Filter (GD=12.5/fs)
Passband: 0 ~ 22.22kHz (@ fs=48kHz)
Passband Ripple: +0.055/-0.015dB
Stopband Attenuation: 93dB
Minimum Phase Digital Filter (GD=3.5/fs)
Passband: 0 ~ 21.75kHz(@ fs=48kHz)
Passband Ripple: +0.04/-0.02dB
Stopband Attenuation: 93dB
Master / Slave Mode
Master Clock:
256fs/512fs (Normal Speed; 8kHz~48kHz)
256fs (Double Speed; 48Hz ~ 96kHz)
128fs (Quad Speed; 96kHz ~ 192kHz)
64fs (Octal Speed; 192kHz ~ 384kHz)
32fs (Hex Speed; 384kHz ~ 768kHz)
Audio Interface Format: 32bit MSB justified, I2S compatible or TDM
Cascade TDM I/F: 8ch/48kHz, 4ch/96kHz, 4ch/192kHz
Digital HPF for Offset Cancel
Overflow Flag
Power Supply:
4.75 ~ 5.25V(Analog),3.0 ~ 3.6V(Digital)
Power Dissipation: 455mW
Ta = -10 ~ 70 C
Package: 44-pin LQFP
图1. AK5397框图
图2. AK5397应用电路图
评估板AKD5397-SA
The AKD5397-SA is an evaluation board for AK5397, which is 32bit,768kHz,2ch ADC.
The AKD5397-SA is includes the the analog input circuit and also has a digital interface transmitter.Further, the AKD5397-SA can achieve the interface with digital audio systems via BNC-connector.
图2.评估板AKD5397-SA外形图(部分)
图3.评估板AKD5397-SA框图
图4.评估板AKD5397-SA电路图(1)
图5.评估板AKD5397-SA电路图(2)
图6.评估板AKD5397-SA电路图(3)
图7.评估板AKD5397-SA电路图(4)
图8.评估板AKD5397-SA电路图(5)
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